Question

Why do we get musical notes when we blow air in to straws of different length, with their lower ends sealed?

Answer 1

Answer:

As air is blown over the open end of the straw, it vibrates. The pitch, or frequency, is determined by the length of the tube, which acts as a resonating chamber. The longer the length, the lower the pitch or note. A long straw produces a low note, while a short straw produces a high note.